CN206628598U - Dual-frequency combination card Sai Gelun antenna feeds structure and Cassegrain antenna - Google Patents
Dual-frequency combination card Sai Gelun antenna feeds structure and Cassegrain antenna Download PDFInfo
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- CN206628598U CN206628598U CN201720457359.0U CN201720457359U CN206628598U CN 206628598 U CN206628598 U CN 206628598U CN 201720457359 U CN201720457359 U CN 201720457359U CN 206628598 U CN206628598 U CN 206628598U
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Abstract
It the utility model is related to antenna structure field, particularly one kind and be suitable for dual-frequency combination card Sai Gelun（Cassegrain）Antenna feed structure and Cassegrain antenna.The utility model provides a kind of Double frequency feed source structure for Cassegrain antenna, it can cause the Cassegrain antenna using this structure while can have high frequency, the signal transmitting and receiving function of low frequency by being uniformly arranged high frequency feed and low frequency feed simultaneously along an imaginary axis.
Description
Technical field
It the utility model is related to antenna structure field, particularly one kind and be suitable for dual-frequency combination card Sai Gelun
（Cassegrain）Antenna feed structure and Cassegrain antenna.
Background technology
Card match Glenn（Cassegrain）Antenna is one of ultra-high frequency antenna of high-gain, and generally it is made up of three parts,
That is main reflector, subreflector and radiation source（Feed）.Wherein main reflector is the paraboloid of revolution, and subreflector is rotation hyperbolic
Face.In structure, a bi-curved focus overlaps with paraboloidal focus, and hyperboloid focal axis overlaps with paraboloidal focal axis,
And radiation source is located in bi-curved another focus, its electromagnetic wave sent by subreflector to radiation source carries out once anti-
Penetrate, by reflection of electromagnetic wave to main reflector, then obtain the plane wave wave beam of respective direction after main reflector reflects again, with
Realize directional transmissions.The characteristics of card match Glenn has feeder line short, and feed is flexible, low sidelobe, high-resolution, and magnitude-phase characteristics is excellent,
Therefore it is widely used in telecommunication and high-resolution radar detection system.Traditional Cassegrain antenna is only operated in list
One frequency, the feed structure of current Cassegrain antenna are to be directed to single-frequency design of operating modes mostly, but work as and require day
Line is to multi-functional（Common antenna replaces how secondary or even many antennas, adapts to EMC Requirements）During development, current Ka Saige
Human relations antenna feed structure is difficult to realize corresponding function.
Utility model content
Goal of the invention of the present utility model is：Feed structure for current Cassegrain antenna is for single mostly
The problem of frequency design of operating modes, there is provided a kind of can be operated under double frequency pattern is used for Cassegrain antenna compound feed
Structure.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of dual-frequency combination card Sai Gelun antenna feed structures, including at least two low frequencies being uniformly arranged around an imaginary axis
Feed, and, at least two high frequency feeds being uniformly arranged along the imaginary axis；
The high frequency feed is surrounded by the low frequency feed and set.
Preferably, the low frequency feed, high frequency feed quantity are identical or different.As the low frequency feed is two, three,
Four, or even eight.
Preferably, the low frequency feed top is to the inclined inclined-plane of the imaginary axis.
Preferably, the angle of inclination on the inclined-plane is 0 degree ~ 80 degree.
Preferably, the low frequency feed section is regular polygon, or, is the annulus with specific arc.
In some embodiments, the low frequency feed sets the fossaperturate of high frequency feed being left close to the part of the imaginary axis.
Preferably, the high frequency feed includes dielectric portion, waveguide section and transition part.
Preferably, the transition part is stepped or conical grading structure.
Preferably, the dielectric portion material is polytetrafluoroethylene (PTFE), ceramics, zinc sulphide, quartz or other common antenna media
Material.
Preferably, the bottom of the low frequency feed and high frequency feed is connected using waveguide flange with corresponding transmitting-receiving branch road.
Present invention simultaneously provides a kind of dual-frequency combination card Sai Gelun antennas, the feed of the antenna is using feedback as described above
Source structure, in antenna, the imaginary axis in the feed structure for primary reflection surface and subreflector focal axis.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：The utility model provides
A kind of Double frequency feed source structure for Cassegrain antenna, it by being uniformly arranged high frequency feed and low frequency simultaneously along an imaginary axis
Feed, the Cassegrain antenna using this structure can be caused while can have high frequency, the signal transmitting and receiving function of low frequency.
Brief description of the drawings
Fig. 1 a are feed structure schematic cross-sections in the specific embodiment of the utility model one.
Fig. 1 b are feed structure schematic cross-sections in the utility model another specific embodiment.
Fig. 1 c are feed structure schematic cross-sections in the utility model still another embodiment.
Fig. 2 is the utility model specific embodiment medium-high frequency feed structure schematic diagram.
Fig. 3 is low frequency feed structure schematic diagram in the utility model specific embodiment.
Fig. 4 is the antenna schematic diagram provided in the utility model.
Marked in figure：1- subreflectors, 2- primary reflection surfaces, 3- high frequency feeds, 311- dielectric portion, 312- waveguide sections, 313-
Transition part, 314,412- waveguide flanges, 4- low frequency feeds, 411- low frequency feed bodies.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.
Embodiment 1：As shown in Fig. 1 c, Fig. 2, Fig. 3, the present embodiment provides one kind and is used for dual-frequency combination card Sai Gelun antenna feeds
Source structure, it includes four low frequency feeds 4 being uniformly arranged around an imaginary axis, and, four high frequencies being uniformly arranged along the imaginary axis
Feed 3；High frequency feed 3 surrounds setting by low frequency feed 4, while high frequency feed 3 and low frequency feed 4 work independently, by with
The high frequency of rear end independence, the corresponding connection of low frequency transmitting-receiving branch road form corresponding and difference beam, realize the detection tracking to target.
In practical application, low frequency feed 4, the quantity of high frequency feed 3 can be with identical or different.For example the quantity of low frequency feed 4 can
To be two, three, four, or even eight, and simultaneously, the quantity of its high frequency feed 3 can be four or five, Huo Zheqi
His quantity；Meanwhile the section of low frequency feed 4（The particularly section of low frequency feed body 411）Can be regular polygon, such as
Square, rectangle, triangle, rhombus or the annulus with specific arc as shown in Figure 1a, Fig. 1 a, Fig. 1 b and figure
1c sets forth the sectional view of different feed structures.
Because in Cassegrain antenna, feed is always provided in the virtual focus position of negative reflecting surface 1（That is phase center）,
And want antenna system and reach optimum gain, the edge of subreflector 1 will have certain irradiation taper, it is necessary to use high directivity
Feed, main lobe energy uniform irradiation is allowed, by secondary radiation, to pass through primary reflection surface 2 on subreflector 1（Parabola face）With flat
The form of face ripple is radiated in free space, meets geometrical light-path during optimum gain, enabled to measure farthest utilization.
In order to meet system requirements, the present embodiment medium-high frequency feed 3 selects Jie of the property changed such as Sidelobe, high-gain, good directional diagram
Matter staff aerial is as feed, and in concrete application, high frequency feed 3 includes dielectric portion 311, waveguide section 312 and transition part 313, and
Transition part 313 can be stepped or conical grading structure, and in the present embodiment, dielectric material can select polytetrafluoroethylene (PTFE),
With adding unit antenna gain, reduce beam angle, certain dielectric material can also be polytetrafluoroethylene (PTFE), ceramics, zinc sulphide,
Quartz or other common antenna dielectric materials.
In view of the complex form of two kinds of feeds, high frequency feed 3 and low frequency feed 4 need to form least interference between each other,
Avoid enclosing high frequency feed 3 in peripheral low frequency feed influence；Simultaneously as limited by system dimension, using this feed structure
When, the primary reflection surface 2 and the size of subreflector 1 of antenna are preferably designed using high band, and now, for the feed of low-frequency range
For, the size of subreflector 1 can show slightly small, so as to produce diffraction, but can cause pair if the size of subreflector 1 is increased
Anti- blocks change greatly, and so as to influence the efficiency of whole antenna system and gain, thus low frequency feed 4 uses tiltedly in the present embodiment
The electromagnetic horn form of section, i.e. low frequency feed top 4 is to the inclined inclined-plane of the imaginary axis.Specifically, the inclination angle on the inclined-plane
Degree can be arranged on arbitrary value between 0 degree ~ 80 degree, such as 10 degree, 25 degree, 45 degree, 60 degree, 75 degree, 80 degree, wherein it is preferred that adopting
With 45 degree.This structure type can effectively avoid the energy diffraction caused by out of focus, concentrate feed energy and be pointed into secondary reflection
On face 1, so that can be relative using the subreflector 1 of the Cassegrain antenna of the feed structure with beveled top end
It is smaller in the negative reflecting surface 1 of the Cassegrain antenna using the feed structure without beveled top end.
In order to further reduce feed sectional area, in certain embodiments, as illustrated in figure 1 c, low frequency feed 4 is close
The fossaperturate for setting high frequency feed 3 is left in the part of the imaginary axis, and high frequency feed 3 is arranged in the fossaperturate and causes the structure and figure
Embodiment shown in 1b is compared, and structure is compacter.
Meanwhile the selection of the bottom of low frequency feed 4 and high frequency feed 3 uses waveguide flange（314、412）With corresponding transmitting-receiving
Branch road connects, specifically, each feed can use single waveguide flange and the transmitting-receiving branch road connection of corresponding low frequency, can also
As shown in Figure 2 and Figure 3, low frequency feed and high frequency feed each using a unified waveguide flange 314,412 with it is corresponding low
Frequency or high frequency transmitting-receiving branch road connection.
Embodiment 2：As shown in figure 4, the present embodiment provides a kind of double frequency for applying the feed structure that embodiment 1 is provided
Compound Cassegrain antenna, the feed of the antenna use feed structure as described above, in antenna, in the feed structure
The imaginary axis is the focal axis of primary reflection surface 2 and subreflector 1.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
- A kind of 1. dual-frequency combination card Sai Gelun antenna feed structures, it is characterised in that including around an imaginary axis be uniformly arranged to Few two low frequency feeds, and, at least two high frequency feeds being uniformly arranged along the imaginary axis；The high frequency feed is surrounded by the low frequency feed and set.
- 2. feed structure according to claim 1, it is characterised in that the low frequency feed, high frequency feed quantity it is identical or It is different.
- 3. feed structure according to claim 1, it is characterised in that the low frequency feed top is inclined tiltedly to the imaginary axis Face.
- 4. feed structure according to claim 3, it is characterised in that the angle of inclination on the inclined-plane is 0 degree ~ 80 degree.
- 5. feed structure according to claim 4, it is characterised in that the low frequency feed section is regular polygon, or, For the annulus with specific arc.
- 6. feed structure according to claim 5, it is characterised in that the low frequency feed leaves in the part close to the imaginary axis The fossaperturate of high frequency feed is set.
- 7. feed structure according to claim 1, it is characterised in that the high frequency feed include dielectric portion, waveguide section with And transition part.
- 8. feed structure according to claim 7, it is characterised in that the transition part is stepped or conical graded junction Structure.
- 9. feed structure according to claim 1, it is characterised in that the bottom of the low frequency feed and high frequency feed uses Waveguide flange is connected with corresponding transmitting-receiving branch road.
- 10. a kind of dual-frequency combination card Sai Gelun antennas, it is characterised in that the feed of the antenna uses such as claim 1 to 9 times One feed structure provided, the imaginary axis are the focal axis of primary reflection surface and subreflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720457359.0U CN206628598U (en) | 2017-04-27 | 2017-04-27 | Dual-frequency combination card Sai Gelun antenna feeds structure and Cassegrain antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720457359.0U CN206628598U (en) | 2017-04-27 | 2017-04-27 | Dual-frequency combination card Sai Gelun antenna feeds structure and Cassegrain antenna |
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| CN206628598U true CN206628598U (en) | 2017-11-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069225A (en) * | 2017-04-27 | 2017-08-18 | 成都雷电微力科技有限公司 | A kind of Cassegrain antenna feed structure and Cassegrain antenna |
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2017
- 2017-04-27 CN CN201720457359.0U patent/CN206628598U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069225A (en) * | 2017-04-27 | 2017-08-18 | 成都雷电微力科技有限公司 | A kind of Cassegrain antenna feed structure and Cassegrain antenna |
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| CP03 | Change of name, title or address |
Address after: 610041 Shiyang Industrial Park, No.288, Yixin Avenue, hi tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu lightning Micro Power Technology Co., Ltd Address before: 610213 Shiyang Industrial Park, hi tech Zone, Chengdu, Sichuan Patentee before: RML TECHNOLOGY Co.,Ltd. |